The invention discloses an improved flower hub manufacturing method and an improved flower hub structure. The improved flower hub manufacturing method comprises the following steps of material preparation, stamping forming, extrusion forming and milling machining. The improved flower hub structure comprises a flower hub body, wherein two sides of the flower hub body are respectively provided with a left disc chuck and a right disc chuck, a shaft pipe is connected between the left disk chuck and the right disk chuck, a driving block is arranged on an end portion of the outer side of the right disk chuck, a collar journal portion with the diameter less than the diameter of the driving block is arranged between the right disk chuck and the driving block in a connecting mode, three sets of connecting portions are arranged on the circumferential side of the driving block, three cutting sections are arranged among the three sets of connecting portions in an equidistant mode, and three heat-dissipating holes are formed, corresponding to the three cutting sections, in the right disk chuck. The three heat-dissipating holes and the collar journal portion can be formed simply through a one-time milling machining step, and therefore the effects of simplifying machining manufacture process and reducing product weight are achieved.